Electric-switch handle



H. A: EVERETT. ELECHHC SWITCH HANDLE. APPucqrmN man 1mm. 1920.

Patented Feb. 15,1921.

i very thin metal is encountered.

UNITED STATES PATENT OFFICE.

HENRY A. EVERETT, OF HADDON HEIGHTS. NEW JERSEY, ASSIGNOR TO HIMSELF AND LEWIS SYKES. OF CAMDEN. NEW JERSEY.

Application filed January 13,

To' all whom it may concern:

Be it known that I, HENRY A. Evnnn'r'r, a citizen of the United States of America. residing in Haddon Heights, county of Camden, in the State of New Jersey, have invented certain new and useful improve ments in Electric-Switch Handles, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof.

My invention relates to switch handles intended for use in connection with electrically driven tools and particularly adapted 5,. for use in connection with portable electricslly driven drilling and reaming machines. In such machines as heretofore constructed it has been found that in the course of se the machine not infrequently gets into posh tions which makes it impossilole for the operator to have access to the buttons or triggers provided for opening and closing the switches for starting and stopping machines, and it is particularly to provide a switch handle which will put the starting and stopping of the machine at all times within the operators control that my invention is designed, though I have also in view the provision of a switch actuating handle by means of which the switch can he opened and closed by a slow jabbing action whereby full control of the machine is imparted both in starting the machine and when the tool is about to break-through the hole or where A further object of my invention is to simplify the general construction of the switch handle and avoid the use of complicated and dolicate machinery.

The nature of my improvements will be best understood as described in connection with the drawing in which Figure 1 is a side elevation of an electrically driven tool provided with my im proved switch handle.

Fig. 2 is a sectional plan view of the switch handle and of a portion of its coacting mechanism taken as on'the section line 2-2 of Fig. 1, and

Fig. 8 is a plan view of a portion ot the Bebfixed part of the handle showin the bayonet joint slot which I find to be t e most con- Specification of Letters Yatent.

Patented Feb. 15, 1921.

1920. Serial No. 351,235.

venient iatching devicefor holding the grip and switch closing plunger in switch closing position.

A indicates the electrically which may be of any usual construction and is not shown in detail. C is a fixed handle member extending out from the tool. and C another fixed handle member with which such tools are frequently provided. D indicates the usual cord containing the live wires D and D which are. in any convenient way. connected to the switch contacts P and P. At E, I have indicated my improved switch handle, which shown, and as prefinrahly constructed. consists of a. base plate F aduptedto be secured to the machine and having extending from it a fixed handle member F, preferably made, as shown, in the form of a sleeve with a closed end indicated at F and in this sleeve I form a bayonet joint, see Fig. 3, consisting of a longitudinal portion F oi sufficient driven tool length to provide for the longitudinal motion to he given to the plunger and to a portion F extending from the slot F at right angles, as shown. (1: is a guide block formed with a. central longitudinal perforation and held in place. as shown. by a screw K. H is a bufl'e block. preferably of rubber, set in. the end of the tubular portion F, as shown. I is a switch closing plate or dislt secured on the end of a flange rod J, the other end of which is secured to a slide J of insulating material moving in the tube F and having, as shown, a metaliic ring. preferably of steel. secured at its outer end. as shown at J and on this same end of the slide block J is secured a buffer contacting part indicated at J. J is a spring extending betweenthe stationary in sulating guide block G and the slide .l' and acting to push the plunger and switch contact plate in direction to open the switch. L is the grip portion of the switch handle, preferably made, as shown, in the form of a sleeve, longitudinally and rotstiveiy movable on the fixed tubular portion F of the handle. The sleeve is, as shown, slotted at L and through this slot extends a pivot pin L on which is pivotallyconnected the lever M, from one end of which extends the latch lug M. which extends through the slot F in the sleeve F. and engages ring J on the end of the slide block J. As shown in Fig. 2, the other end of the lever M, indirated at M is held in elevated position by a spring as indicated at M and is so located as to be convenientiy accessible to the finger of the operator gripping the sleeve L, so that he can depress it and elevate the latch lug M so that it will release the slide member J.

As shown, the plate F is secured directly to a rim N within which is formed a chamber N, and to the other edge of which is Secured the plate 0, through which are perforations O, O for the switch terminals, said perforations extending into the spring chambers O. O in which are located springs U, P and P indicate the switch terminals yieldingly held in the position indicated in Fig. 2 by the action of the springs Attached to the outer side of the plateor block 0 is the rim Q containing a blowout coil Q. R is the conducting wire extending from the switch terminal P, R a conducting \vire extending from the switch terminal I" and connecting with the blowout coil Q from which leads the com ducting wire R S, S, indicate bolts by which the switch handle, and immediately connecting parts, are secured to the body of the tool A.

In operation the sleeve grip is normally connected to the switch actuating plunger by the engagement of the lug M with the plunger, as shown in Fig. 2. When it is desired to close the switch the sleeve grip is moved toward the tool carrying with it the switch closing plunger until it comes in com tact with the terminals P and P, and it will he observed that the device is of such a character that the switch can be closed and opened by a jabbing motion'of the hand, so as to control the action of the tool in start,- ing' or where delicate work is involved. When it is desired to permanently close the switch all that, is necessary is for the opera tor to give a slight rotative movement of the sleeve handle engaging the lug M in the portion Ff of the slot formed in the sleeve F. When again it is desired to open the switch this may be done by turning the handle to disengage the lug finger from the bayonet joint slot or by pressing down on the end M of the lever M, leaving the In linger M out of engagement with the switch carrying plunger, which, through the action of the spring J, will atonce move into p0,- sition to open the switch, the impetus of the moving parts being taken up on the buffer block H.

\Vhile l have, as required by law,'illustrated and described by invention in what I believe to be its most perfect and useful adaptation and form it will be understood that I do not intend to limit the claims to the specific embodiment of the invention illustrated, as it is capable of useful application in many terms and modifications. l-Iaving now described my invention, what I claim as new and desire to secure by Letters Patent, is: f

1. A switch handle for electric tools comprising a fixed handle member adapted to'be secured to and to projectfrom the bodyof the tool, in combination with a. switch clos ing plunger guided in said member, a. spring acting to move the plunger in direction to open the switch, a slidin grip longitudi nally movable on the fixed member, means en aging the grip and plunger so that they will move together and a latch for holding the grip in switch closing position. I

2. A switch handle for electric tools comprising a fixed handle member adapted to be secured to and to project from the body of the tool, in combination with a switch closlug plunger guided in said member, a spring acting to move the plunger in direction to'open the switch, a sliding grip longitudinally movable on the fixed member, a latch extending from the grip to engage the plunger, latch releasing means accessible from the outside of the grip, and a latch for holding the grip in switch closing position.

3. A switch handle for electric tools comprising a fixed .handle member adapted to be secured to and to project from the bod of the tool, in combmation with a switc closing plunger guided in said member, a spring acting to move the plunge?- in a. direction to open the switch, a sleeve handle grip longitudinally" and rotatively movable on the fixed handle member and connected to the. plunger so as to move longitudinally with it and a catch for holding the sleeve and plunger in position to close the switch engaged and disengaged b a rotative motion of the sleeve on t e fixed handle 110 member.

4. A switch handle for electric tools comprising a tubular fixed handle member adapted to be secured to and to project from the body of the tool, and having a. 115 bayonet joint slot formed through its wall, in combination with a switch closing plunger guided in said member, a spring acting to move the plunger in a direction to open the switch, a sleeve handle rip longitudi- 120 -nally and rotatively movab e on the fixed net joint slot and hold the plunger in switch position.

(ilOSlllg p 5. switch handle for electric tools com-.

prising a fixed handle member adapted to be secured to and to project from the body of the tool, in combination with a switch closing plunger guided in said member, a spring acting to move the plunger in a direction tc open the switch, a sleeve handle 1; grip longitudinall and rotatively movable on the. fixed handle member, a catch finger secured to the sleeve and adapted to engage the plunger, a catch finger releasing device lying on the outside 0 the sleeve, and a catch for holding the sleeve and plunger in 10 switchelosing position engaged and disengeged by a rotative movement of the sleeve.

HENRY A. EVERETT. 

